T-8110L AGERE [Agere Systems], T-8110L Datasheet - Page 89

• Manufacturer Part Number: T-8110L
• Manufacturer: AGERE [Agere Systems]

February 2004
Agere Systems Inc.
9 Stream Rate Control
9.2 L-Bus Stream Rate Control Registers
9.2.4 16.384 Mbits/s Local I/O Superrate
The configurations are selected as a consequence of the connection programming. The data is inputted or output-
ted as a true 16-bit at 16.384 Mbits/s signal. Programming a 16-bit connection requires two separate byte connec-
tions, one for the MS-byte and the other for the LS-byte.
Note: n = even number, m = integer.
Thus, programming a connection to stream n + 1 is programming a connection to the MS-byte on output pin n + 1
and programming a connection to stream n is programming a connection to the LS-byte on output pin n + 1. Simi-
larly, programming a connection from stream n + 1 is programming a connection from the MS-byte on input pin n
and programming a connection from stream n is programming a connection from the LS-byte on input pin n.
(An easier way to remember this is that the even/odd identifier becomes the MS-byte/LS-byte identifier.)
As a consequence of this arrangement, the T8110L permits byte-packing at the superrate in analogous manner to
subrate bit-packing.
61 ns
15
Figure 19. Relationship Between 8.192 Mbits/s and 16.384 Mbits/s Time Slots
122 ns
7
14
WRITES TO/READS FROM HERE
PROGRAMMING A CONNECTION
STREAM n + 1, TIME SLOT m
13
6
16.384 Mbits/s INPUT DATA BITS ARE SAMPLED AT 3/4 POINT (45 ns) OF THE 61 ns BIT TIME
(continued)
8.192 Mbits/s INPUT DATA BITS ARE SAMPLED AT 3/4 POINT (91 ns) OF THE 122 ns BIT TIME
12
FOR
IF INPUT USE STREAM n, IF OUTPUT USE STREAM n + 1
11
SUPERRATE STREAMPAIR n/n + 1, TIMESLOT m
5
8.192 Mbits/s STREAM n + 1, TIMESLOT m
10
8.192 Mbits/s STREAM n, TIMESLOT m
9
(continued)
4
8
AND
Ambassador T8110L H.100/H.110 Switch
7
3
6
WRITES TO/READS FROM HERE
PROGRAMMING A CONNECTION
STREAM n, TIME SLOT m
5
2
4
FOR
3
1
2
1
0
0
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